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- W2015416170 abstract "• The application of organic wastes to soils during reforestation induced higher CO 2 and N 2 O emissions. • The greatest of organic carbon that was present in organic fertilizers remained incorporated in the soil. • Different physical and chemical compositions of organic wastes resulted in different outcomes. The production of organic wastes tends to increase in a manner that is proportional to human population growth. Currently, applying these wastes to soils is being considered as an alternative solution for the over production of organic waste. However, the levels of greenhouse gas (GHG) emissions from organic waste applications in tropical forestry are unknown. The aim of the present study was to quantify soil carbon dioxide (CO 2 ), nitrous oxide (N 2 O) and methane (CH 4 ) emissions from a reforestation project, where trees ( Calophyllum brasiliense ) were fertilized with different mineral and organic waste materials. A randomized trial was established to measure soil GHG emissions from plots fertilized with sewage sludge compost (SSC), sewage sludge (SS), mineral fertilizer (Min Fert) and a control (C). C. brasiliense seedling spaced in 3 m × 2 m intervals were place into a planting hole which had fertilizer incorporated for seedling establishment. Soil GHG were measured using the static chamber method, placing chambers on the surface of the soil and taking measurements over time, during 172 days in a dry season. Organic wastes (SS and SSC treatments) had significantly higher soil CO 2 fluxes than mineral fertilizer and control plots, with soil CO 2 fluxes of 6.35 ± 1.17 and 9.33 ± 0.96 g C m −2 day −1 , respectively. The application of organic wastes promoted a drastic increase in soil N 2 O emissions treated with SSC (141.19 mg ± 21 N m −2 day −1 , p < 0.01), which had a higher emission factor (2.11%). Average soil CH 4 flux on collection days was −0.1 ± 0.2 mg C m −2 day −1 , although cumulative soil CH 4 emissions over the 5 months study period was positive for the SS treatment, demonstrating the potential emission of GHG from this treatment. Apparently, the variation in fluxes between treatments with organic residues was influenced by differences in the physical and chemical compositions of the wastes and the amounts of labile carbon added." @default.
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- W2015416170 date "2013-12-01" @default.
- W2015416170 modified "2023-10-06" @default.
- W2015416170 title "Effects of organic and inorganic fertilizers on greenhouse gas (GHG) emissions in tropical forestry" @default.
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- W2015416170 doi "https://doi.org/10.1016/j.foreco.2013.08.018" @default.
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